The eckert lithographing co



113488 I y1 PATEN'I'ED APRTL 1371 TME EcKERT LITHOGRAFHING cc. WASHINGTON, n, c.

dalla 'JAMES Barnes, or AUGUSTA; MAINE.

Letters Patent No. 113,488, dated April 11, 1871.

' IMPROVEMENT IN MACHlNES FOR RDUCING IWD FCR THE MANUFACTURE OF PAPER-PULP.

The Schedule referred to in these Letters Patent an making paxt of 'the same.

To all persons to whom these pacseats may come: Be it known that I, JAMES BRIDGE, of Augusta,

' of the county of Kenncbec and Stat-e ofMaine, have invented a new and useful improved Machinc'i'or Reducing'XVood for its Conversion into Paper-Pulp;

'and l do hereby declare the same to be fully described in the following specification and represented in. the accompanying drawing, ofwhich- Figure l is a top view;

Figure 2, a longitudinal section; and

Figure 3, a transverse section of such machine.

I n suchdrawing- VAalenotes a hollow drum or cylinder mounted concentric-ally on a shaft, B, having its journals supported lsuitable boxes ct a applied to a sustainingframe, C.

A driving-pulley or wheel, l), iixcd on the shaft r,s erves, by means of an endless belt, to impart rotary foa'otion to the shaft and cylinder'.

Within the periphery of the drum there is arranged aserie's of rasping or disintegrating cutters or tools, a'gyhich may be disposed either directly to'or oblique] y actress the cylinder', they being tixed therein so as to project a shortdistance outwardly beyond its curved surface. j j j, l p

Furthermore,fthereare arranged about'the upper half of the cylinder or drum a series of bars or thin blades, 1),'1tlrey being disposed with respect to each other andiliddrum in manner as represented, and held in place' by two arches, trusses, or standards, E E, eretited ou the frame C or forming part thereof.

Shutters 11 F', pivoted at their upper corners to the standards E E, are disposed with respect tothe front bars or blades D in Inanneras represented, the lowermost shutter closing down upon the upper edge of an apron, sbroudingor elastic chute, G, disposed under the drum in manner as represented.

This slirouding is to be a plate of metal fastened at or near its upper corners to the frame C, but free in other respects to spring toward or away from the curved surface ot' the drum. Ait its lower edge or part the elastic chuteY is to nearly touch the drum. In using the machine one 'or more blocks of wood are to be placed in the spaces between the peripheral bars that are uuprovided with shutters, such block or blocks being allowed to rest sidewise against the cylinder, which may be'supposed to be in revolution in a direction toward the shutters, as indicated in fig. 2 by the arrow e.

'The tools of the cylindenor drum will rasp or remove from the block or blocks slivers or portions ot" them, which, by being carried forward underneath the lower edges of the lperipheralbars., and also in the spaces between the cylinder and the shutters, will be more or less retained by the bars and shutters, and so as to be further reduccdiby the cutters or tools.

The wood, in passing between the elastic chute or apron and the cylinder, will be prcssedfup to the latter by ,the apron, and will be still further reduced in consequence thereof, it being finally discharged at the lower terminus of the apron.

rlhe shutters admit of the accumulation of the' slivers of wood in the spaces covered by such shutters, the slive'rs being more or less agitated and moved about within such spaces so as to be favorably acted on by the tools and the peripheral bars.

In the said machine l claim as my invention as follows, viz:

l. The disintegrating-drum A, made as described. 2. The rotary hollow disintegrating-druin A, and

. the peripheral bars or blad es D, combined. and arranged lfVitnesses flt. H. EDDY, J. 1t. SNOW. 

